openethereum/parity-clib/Parity.java
Niklas Adolfsson b4f8bba843 parity-clib: async C bindings to RPC requests + subscribe/unsubscribe to websocket events (#9920)
* feat(parity-clib asynchronous rpc queries)

* feat(seperate bindings for ws and rpc)

* Subscribing to websockets for the full-client works

* feat(c binding unsubscribe_from_websocket)

* fix(tests): tweak CMake build config

* Enforce C+11

* refactor(parity-cpp-example) : `cpp:ify`

* fix(typedefs) : revert typedefs parity-clib

* docs(nits)

* fix(simplify websocket_unsubscribe)

* refactor(cpp example) : more subscriptions

* fix(callback type) : address grumbles on callback

* Use it the example to avoid using global variables

* docs(nits) - don't mention `arc`

* fix(jni bindings): fix compile errors

* feat(java example and updated java bindings)

* fix(java example) : run both full and light client

* fix(Java shutdown) : unsubscribe to sessions

Forgot to pass the JNIEnv environment since it is an instance method

* feat(return valid JString)

* Remove Java dependency by constructing a valid Java String in the callback

* fix(logger) : remove `rpc` trace log

* fix(format)

* fix(parity-clib): remove needless callback `type`

* fix(parity-clib-examples) : update examples

* `cpp` example pass in a struct instead to determines `callback kind`
* `java` add a instance variable the class `Callback` to determine `callback kind`

* fix(review comments): docs and format

* Update parity-clib/src/java.rs

Co-Authored-By: niklasad1 <niklasadolfsson1@gmail.com>

* fix(bad merge + spelling)

* fix(move examples to parity-clib/examples)
2019-01-02 16:49:01 +01:00

87 lines
3.1 KiB
Java
Raw Permalink Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

// Copyright 2018 Parity Technologies (UK) Ltd.
// This file is part of Parity.
// Parity is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// Parity is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with Parity. If not, see <http://www.gnu.org/licenses/>.
package io.parity.ethereum;
/**
* Interface to the Parity client.
*/
public class Parity {
/**
* Starts the Parity client with the CLI options passed as an array of strings.
*
* Each space-delimited option corresponds to an array entry.
* For example: `["--port", "12345"]`
*
* @param options The CLI options to start Parity with
*/
public Parity(String[] options) {
long config = configFromCli(options);
inner = build(config);
}
/** Performs an asynchronous RPC query by spawning a background thread that is executed until
* either a response is received or the timeout has been expired.
*
* @param query The JSON-encoded RPC query to perform
* @param timeoutMillis The maximum time in milliseconds that the query will run
* @param callback An instance of class which must have a instance method named `callback` that will be
* invoke when the result is ready
*/
public void rpcQuery(String query, long timeoutMillis, Object callback) {
rpcQueryNative(inner, query, timeoutMillis, callback);
}
/** Subscribes to a specific WebSocket event that will run in a background thread until it is canceled.
*
* @param query The JSON-encoded RPC query to perform
* @param callback An instance of class which must have a instance method named `callback` that will be invoked
* when the result is ready
*
* @return A pointer to the current sessions which can be used to terminate the session later
*/
public long subscribeWebSocket(String query, Object callback) {
return subscribeWebSocketNative(inner, query, callback);
}
/** Unsubscribes to a specific WebSocket event
*
* @param session Pointer the the session to terminate
*/
public void unsubscribeWebSocket(long session) {
unsubscribeWebSocketNative(session);
}
// FIXME: `finalize` is deprecated - https://github.com/paritytech/parity-ethereum/issues/10066
@Override
protected void finalize() {
destroy(inner);
}
static {
System.loadLibrary("parity");
}
private static native long configFromCli(String[] cliOptions);
private static native long build(long config);
private static native void destroy(long inner);
private static native void rpcQueryNative(long inner, String rpc, long timeoutMillis, Object callback);
private static native long subscribeWebSocketNative(long inner, String rpc, Object callback);
private static native void unsubscribeWebSocketNative(long session);
private long inner;
}